I don't like that book, I think it's silly. I prefer to research BPD through psychoanalytical books.... Try work by Nancy McWilliams.... it puts things in a much better perspective, and spends a lot more time on how someone with a personality disorder relates to his/her therapist. And... it does a much better job of actually explaining what a personality disorder is. I love her work. Oh, and when I say "it," I'm talking about a specific one-- 'Psychoanalystic Diagnosis-- Understanding Personality Structure in the Clinical Process" It's actually a book for therapists... I had to buy it for one of my Counseling Techniques classes.... but it works for me both as a student and a client.... check it out!